After completion of this chapter, students will be able to:

- know about vector and vector geometry.
- solve the problems of vector.
- solve the theorems of vector geometry.

Let \(\overrightarrow a\) and \(\overrightarrow b\) be two and θ the angle between them, then the scalar product between \(\overrightarrow a\) and \(\overrightarrow b\) is denoted by \(\overrightarrow a\). \(\overrightarrow b\) and is defined as the product of the magnitudes of \(\overrightarrow a\) and \(\overrightarrow b\) with the cosine of the angle θ.